Question

How many grams are in 9.30 x 10-2 moles of calcium phosphate, Caz(PO3)2?

Answer 1

Answer:

25.9 g

Explanation:

Given that,

No of moles of calcium phosphate, $n=9.3\times 10^{-2}$

We need to find how many grams of calcium phosphate has this much of no of moles.

Mass divided by molar mass is equal to the no of moles on a molecule.

The molar mass of calcium phosphate is 310.18 g/mol

Using the concept of no of moles as follows :

$n=\dfrac{m}{M}\\\\m=n\times M\\\\m=9.3\times 10^{-2}\times 310.18\\\\m=28.84\ g$

Out of given options, option (a) i.e. 25.9 g is the correct answer.